A short how to guide on retrieving your PHPSESSID cookie that pixiv_down
requires.

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How To Retrieve Your PHPSESSID
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1. Open your browser and navigate to https://www.pixiv.net/
2. If you're not logged in, then log in.
3. Open your developer tools.
  3.1. You should be able to press CONTROL + SHIFT + I
  3.2. Otherwise, right click anywhere on the page and choose the
       "Inspect Element" option.  Sometimes this option is just called
       "Inspect".
4. Navigate to the "Storage" tab.
  4.1. If this tab is not visible, click on the small gear icon located at
       the upper-left of the developer tools window.
  4.2. You should then be able to tick the "Storage" checkbox.
5. Select the "Cookies" dropdown.
6. Select www.pixiv.net
7. Double-click the cell next to "PHPSESSID" and copy the value.

You can now run `pixiv_down reset` and enter your token!


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Chromium
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Please note that I do not use any chromium-based browser (Google Chrome,
Vivaldi, Microsoft Edge, etc.), so I'm not 100% sure the instructions are
correct for those browsers.  Please let me know if there are any issues or
major differences.
